Consider the equilibrium system below.

NH4Cl(s)<==>NH4Cl(g)

If the system is at dynamic equilibrium, which statement is true?

A.Sublimation of the NH4CI crystals stops.

B.Solidification of the NH4CI vapors stops.

C.The rate of sublimation of the NH4CI crystals is equal to the rate of solidification of the NH4CI vapors.

D.The rate of sublimation of the NH4CI crystals is higher than the rate of solidification of the NH4CI vapors.

I think the correct answer from the choices listed above is option C. If the system is at dynamic equilibrium, then the rate of sublimation of the NH4CI crystals is equal to the rate of solidification of the NH4CI vapors. Hope this answers the question. Have a nice day.

Answer Link

PBCHEM PBCHEM · Answer 2 · 2018-08-15T02:55:33-04:00

Answer : Option C) The rate of sublimation of the \(NH_{4}CI\) crystals is equal to the rate of solidification of the \(NH_{4}CI\) vapors.

Explanation : In the given reaction of \(NH_{4}CI_{(s)} <---->[tex] NH_{4}CI_{(g)}\);

If the system is in dynamic equilibrium, then the rate of sublimation of ammonium chloride will be equal to the rate of production if ammonium chloride vapors.

A dynamic equilibrium is when the reversible reaction resists to change its ratio of reactants or products, but substances keep moving between the chemicals at an equal rate, as there is no net change observed.